Who serves as a soldier at his own expense? Who plants a vineyard and does not eat of its fruit? Who tends a flock and does not drink of its milk? Do I say this from a human perspective? Doesn’t the Law say the same thing? For it is written in the Law of Moses: “Do not muzzle an ox while it is treading out the grain.” Is it about oxen that God is concerned? Isn’t He actually speaking on our behalf? Indeed, this was written for us, because when the plowman plows and the thresher threshes, they should also expect to share in the harvest. If we have sown spiritual seed among you, is it too much for us to reap a material harvest from you?
— 1st Corinthians 9:7-11
Not out of compulsion, for God loves a cheerful giver.